Finding the Fourth Proportional to 78,807, 118,147.80 and 39,342.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,807 : 118,147.80 = 39,342.72 : x
2. Step 2: Convert to fraction form
   78,807/118,147.80 = 39,342.72/x
3. Step 3: Cross multiply
   78,807x = 118,147.80 × 39,342.72
4. Step 4: Simplify right side
   78,807x = 4,648,255,814.02
5. Step 5: Solve for x
   x = 4,648,255,814.02/78,807
6. Step 6: Final answer
   x = 58,982.78